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Voice Flame Extinguisher



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The Myth

THIS MYTH WAS FEATURED IN...
Episode 76: Voice Flame Extinguisher

ORIGINAL AIR DATE: 4/11/2007
Myth Title: ---- Voice Flame Extinguisher


Myth Description: ---- See if somebody's voice (or sound waves) can put out a flame.


MythBusters on the bust: ---- The MythBusters (Adam and Jamie) and the Honorary MythBusters of Meyer Sound. For "MythBuster-Style," add The Build Team (Grant, Kari and Tory).


Hypothesis: ---- A voice/sound wave's vibrations can put out a flame.


Procedure/Experimental Design: ----


Results: ---- Fire was put out by voice through speakers with voice magnification. In "MythBuster-Style," sonic booms did extinguish the fire.


Conclusion: ---- You can put out fire with sound with voice magnification devices and you can put out fire with sonic booms.


Busted or Not Busted: ----Confirmed
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Highlights of the bust:






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Your Scientific Method

Did the MythBusters get it right? How would you have busted this myth differently? Share your experiment design for how you would prove/disprove this myth:

  • Playing the recording of the man claiming to go up to such high frequencies was not useful because old recordings could not provide the frequency range high or low enough.
  • When the first amplified setup was done, it certainly was wrong because facing the speakers at each other could easily reduce the power as waveforms canceled each other out.
See Also

Related myths: ----

Related resources and reference pages: ----




Threads

Anonymous  (Get credit for your thread)
Started By Thread Subject Replies Last Post
mgavel Actually busted... 0 Mar 6 2008, 12:56 AM EST by mgavel
Thread started: Mar 6 2008, 12:56 AM EST  Watch
The speaker actually "blew" out the flame. You will notice that the flame only went out near the speaker's diaphragm. At very low frequencies, the mechanical oscillation of the diaphragm has a much longer distance than higher frequencies where the travel is minuet.

You will not be able to reproduce this with a less mechanical speaker - like an electrostatic loudspeaker.
You will likely be able to extinguish the flame with a speaker diaphragm attached to plain old motor (variable speed drill would do it) and a linkage that creates a 0.5-1inch travel.
That experiment should yeild the flame massive dB's of sound pressue. Use a rig like the one from "Shattering Subwoofer"
abmtong Revise this! 0 Aug 28 2007, 6:48 AM EDT by abmtong
abmtong
Thread started: Aug 28 2007, 6:48 AM EDT  Watch
I have done most of this, but please help by revising/checking for content/ adding more/ etc. we need more of these done!!!!!!!
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